Top Software Engineer Jobs in Paris

Design, build, and evolve a scalable aggregate system to accelerate query performance across cloud data platforms; architect prediction/selection logic for aggregates; optimize maintenance, scheduling, and reliability at scale while collaborating with query planning and platform teams.

Design and implement backend trading services, own features end-to-end (schema, API, tests, UI integration), contribute to real-time infrastructure and client-facing APIs, and write integration tests against real dependencies.

Build and maintain DataDome's client-side JavaScript Tag and server-side integration modules for edge runtimes and backend platforms. Own integration components across multiple languages, improve CI/CD, testing, performance and security, mentor engineers, support onboarding and incident response, and drive technical direction for integrations.

Software Engineers at QuantCo will design and develop scalable solutions, integrate models into client businesses, and improve products based on client feedback.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

The role involves designing and implementing scalable full-stack solutions using OpenAI's APIs, collaborating with customers, and driving project success. Requires extensive customer-facing experience and engineering expertise.

The Backend Software Engineer will design and implement communication systems for tactical C2 applications, ensuring seamless data flow and fault tolerance in challenging environments.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

The Software Engineer will collaborate with project teams to define requirements, develop, test, and maintain software, particularly in C#.NET and web services.

As a Software Engineer, you will deploy models, integrate APIs, enhance infrastructure, ensure AI safety, optimize resources, and maintain high service availability.

As a Software Engineer - ML, you'll transition research into production systems, implement CI/CD pipelines, and enhance automation workflows.

The Software Engineer will develop backend systems using Rust, manage multimodal data, and improve data infrastructure with a focus on performance and design ownership.

Join the frontend team to build and improve HarfangLab's cybersecurity platform. Integrate new features, ensure scalable readable code, drive quality improvements, propose technical enhancements, and collaborate with UX, backend, agent, AI, and DevOps teams using an agile process (TypeScript, Vue 3, Sass).

The role involves optimizing hardware support within a software stack for AI model deployment, collaborating with teams and hardware vendors to enhance performance and portability across platforms.

Canonical seeks open-source enthusiasts to optimize Ubuntu for new silicon technologies, collaborating with teams and customers to enhance software quality and performance across various platforms.

As a Growth Software Engineer, you will scale user and business growth through experimentation, data-driven development, and cross-functional collaboration, particularly in user engagement and retention.

The AI Software Engineer will develop and improve Joko's AI shopping assistant, focusing on architecture, evaluation, data management, and personalized user experiences, while collaborating with product teams.

Build and ship full‑stack features for North, an enterprise AI workspace. Develop secure autonomous agents, execution engines, integrations, observability and evaluation systems. Collaborate with researchers to productionize models and deliver performant, low‑resource deployment code while adhering to strict security and privacy constraints.

Work directly with founders to build and iterate the first versions of an MCP hosting platform. Implement features, deploy and monitor MCP servers at scale, and help ship production-ready infrastructure and web tooling for AI-native agent workflows in a fast-paced startup environment.

Build, design, and ship MCP servers for customers end-to-end. Translate company vision and customer feedback into production features. Perform design, coding, QA, and customer support independently while following MCP best practices. Work closely with customers to deliver reliable, maintainable agent-ready infrastructure.

Develop, optimize, and upstream hardware-accelerated video encode/decode/transcode pipelines on Intel graphics using Quick Sync, oneVPL/VPL, VA-API and D3D backends; engage with open-source communities and ISVs, perform performance and quality analyses, author patches and technical content, and advise Intel product teams to improve media solutions.

Develop, prototype, and optimize Vulkan-based GPU compute solutions across Windows, Linux, and ChromeOS. Work with ISVs, open-source communities, and internal teams to profile, debug, and tune workloads on Intel platforms, provide technical consultation and documentation, and influence hardware/software architecture to improve performance and adoption across client systems.

Lead architecture and platform design for a quantum-computing software stack: design services, APIs, storage, data ingestion, and orchestration; enable hardware/software interaction loops; partner with researchers and data engineers; drive long-term roadmap and mentor engineering teams.

Develop and maintain automated test suites (API and UI) using Python and test frameworks, define manual testing plans and strategies, improve test infrastructure (VMs, containers, provisioning), collaborate with developers to ensure testable code, participate in CI pipelines, and mentor QA team members.

Design, develop, and optimize highly available, scalable microservices for a real-time, high-throughput gaming platform. Work on event-driven systems, APIs, databases, testing, deployments in AWS, performance monitoring, and cross-team technical collaboration.